Datasheet

opc = new OPC(this, "127.0.0.1", 7890);

opc.ledGrid8x8(0, width/2, height/2, height / 16.0, 0, false);

}

We made the window square, which is more convenient when we're working with a square

NeoMatrix. And while we're at it, we'll select the P3D renderer for Processing. This makes it

much faster at drawing images. Since we'll be drawing a large number of particles, this is

really important!

Next, we added the ledGrid8x8() command. This is a shortcut for creating 8x8 LED

matrices.

0 is the index number for the first LED in the matrix, since we connected this matrix to

output 0 on the Fadecandy board. If we were using output 1, we would start the

matrix at LED number 64.

width/2 and height/2 are the center of the matrix. We place it in the center of the

window.

height/16 is the spacing between LEDs. 16 is double the size of our matrix, so this

will make the matrix take up about half the height of the window.

0 is the rotation angle. We aren't rotating the matrix away from its default position, so

the first LED will be in the top-left corner.

false here states that the matrix does not zig-zag. Every row of LEDs points the same

direction.

These parameters, as well as the other LED mapping functions available, are all

documented in the OPC.pde reference (http://adafru.it/cW9).

You can try running the sketch. At this point, our window should be blank except for the

LED matrix: